| abstract |
The invention relates to azo dyes of the formula wherein R₁ is hydrogen, C₁-C₄-alkyl, R₂ C₂-C₄-alkyl, R₃ is hydrogen, C₁-C₄-alkyl or optionally substituted C₅-C₇-cycloalkyl or phenyl and benz rings I and II are optionally substituted.n n n The azo dyes are suitable for dyeing or printing natural or synthetic polyamide materials, particularly in combination with other dyes and in particular from short liquors. The azo dyes are distinguished by generally good properties, in particular good absorption behavior. |